Breya, Esper Defiant

Flying
When Breya, Esper Defiant enters the battlefield, return target artifact from your graveyard to
your hand, you gain life equal to its converted
mana cost.
Whenever Breya, Esper Defiant attacks, create a colorless artifact with "{t}, Sacrifice this artifact:
Add one mana of any color to your mana pool."
for each nontoken artifact you control.